Report: Trump gives world leaders his private cell phone number

President Donald Trump has raised eyebrows among insiders for allegedly encouraging world leaders to call him on his cell phone -- rather than through official channels.

Although the decision to cut out the middle man might seem like an easy way to save time, he has sparked concern about the security and secrecy of his communications.

SEE MORE: One word President Trump tweeted confused the entire internet

According to the Associated Press, Trump has told Mexico and Canada's leaders to call him directly. Apparently only Canadian Prime Minister Justin Trudeau has taken him up on it so far.

He has also apparently also exchanged numbers with French President Emmanuel Macron

But the president's openness to deal directly with world leaders on a cell phone instead of a secure line has national security experts saying the calls are now vulnerable to eavesdropping.

RELATED - See the body language between the president and first lady abroad:

Presidents' phone calls with world leaders often involve considerable advance planning with talking points already mapped out.

Some have compared the move to Hillary Clinton's use of a private email server. During the campaign, then-candidate Trump continuously said that she could not be trusted with classified information.

With the FBI's ongoing probe into Russia and now into his son-in-law and advisor Jared Kushner, private conversations via cell phone may not be the best way to earn their trust.